Clear CMOS
JBT1 is used to clear CMOS. Instead of pins, this "jumper" consists of contact pads
to prevent the accidental clearing of CMOS. To clear CMOS, use a metal object such
as a small screwdriver to touch both pads at the same time to short the connection.
Always remove the AC power cord from the system before clearing CMOS.
Note: For an ATX power supply, you must completely shut down the system,
remove the AC power cord and then close pins 1 and 2 to clear CMOS.
A. Clear CMOS
B. Watch Dog Enable
Watch Dog Enable/Disable
JWD controls the Watch Dog function. Watch Dog
is a system monitor that can reboot the system
when a software application hangs. Close pins
1-2 to reset the system if an application hangs.
Close pins 2-3 to generate a non-maskable inter-
rupt signal for the application that hangs. See the
table on the right for jumper settings. Watch Dog
must also be enabled in the BIOS.
Note: When enabled, the user needs to
write his/her own application software to
disable the Watch Dog Timer.
Watch Dog
Jumper Settings (JWD)
Jumper Setting Defi nition
Pins 1-2 Reset
(*default)
Pins 2-3 NMI
Open Disabled
